Enable golangci linter stylecheck (#3167)

This PR only fixes error string formatting, log message strings are
still mixed upper/lowercase (see
https://github.com/woodpecker-ci/woodpecker/pull/3161#issuecomment-1885140649)
and I'm not aware of a linter to enforce it.

cli/common/flags.go

@@ -64,7 +64,6 @@ func FormatFlag(tmpl string, hidden ...bool) *cli.StringFlag {
 	}
 }
 
-// specify repository
 var RepoFlag = &cli.StringFlag{
 	Name:    "repository",
 	Aliases: []string{"repo"},

cli/deploy/deploy.go

@@ -97,7 +97,7 @@ func deploy(c *cli.Context) error {
 			}
 		}
 		if number == 0 {
-			return fmt.Errorf("Cannot deploy failure pipeline")
+			return fmt.Errorf("cannot deploy failure pipeline")
 		}
 	} else {
 		number, err = strconv.ParseInt(pipelineArg, 10, 64)
@@ -108,7 +108,7 @@ func deploy(c *cli.Context) error {
 
 	env := c.Args().Get(2)
 	if env == "" {
-		return fmt.Errorf("Please specify the target environment (ie production)")
+		return fmt.Errorf("please specify the target environment (i.e. production)")
 	}
 
 	params := internal.ParseKeyPair(c.StringSlice("param"))

cli/user/user_info.go

@@ -41,7 +41,7 @@ func userInfo(c *cli.Context) error {
 
 	login := c.Args().First()
 	if len(login) == 0 {
-		return fmt.Errorf("Missing or invalid user login")
+		return fmt.Errorf("missing or invalid user login")
 	}
 
 	user, err := client.User(login)